Find the Reciprocal $\frac{12}{x^{2}+y^{2}}$ A) $\frac{1}{12 x^{2}+y^{2}}$ B) $-\frac{12}{x^{2}+y^{2}}$ C) $\frac{1}{12 x^{2}+12 y^{2} x}$

Find the reciprocal.
- $\frac{12}{x^{2}+y^{2}}$

A) $\frac{1}{12 x^{2}+y^{2}}$
B) $-\frac{12}{x^{2}+y^{2}}$
C) $\frac{1}{12 x^{2}+12 y^{2} x}$
D) $\frac{x^{2}+y^{2}}{12}$